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Now this is a serious build that gets tremendous nod of approval from BimmerBoost. VAC built an S65 V8 out of an E9X M3 with forged internals including low compression pistons with increased stroke from new rods an a 4.4 liter crank. The end result is a bottom end good for well over 700 horsepower with forced induction as seen pictured below with the VF-Engineering Vortech based centrifugal supercharger kit.

Not only is the motor built, stroked, and supercharged VAC also gave it a billet dry sump system. Some people believe the stock S65 V8 oiling system is up to par but tuners in the know who have disassembled these motors seem to agree on premature bearing wear which the oiling system likely is contributing too. Whether one believe the stock oiling system is up to par or not the billet dry sump system here is definitely a large improvement over the stock system and certainly offers a bit of peace of mind.

Very nice work here by VAC and hopefully they can provide more info on how the dry sump system gets along with supercharged S65 V8 applications and if there is any need to worry about extra stress on the crank. This is definitely one of the baddest S65 V8 forced induction builds out there, great job VAC and give us a dyno shoot as soon as you can.

For a 4.4 liter I would need new rods but I could use my same pistons. Would need the crank as well. How much a difference do you feel the extra displacement makes? Why not go more aggressive than 4.4 liters?

We wanted to stick with the GTS theme. Others have more aggressive options, we chose this one since most of our clients would prefer the 4.4 over 4.6. We stock the 4.4 units.

Also how strong do you feel the block is? This is sleeved? Do you feel flex is an issue? How much HP do you think the block can support even when sleeved? The bore spacing is pretty tight even with the stock bore.

Yep, sleeved. We haven't even thought about pushing the limits of the engine yet, but we have sleeved S62s making over 1k hp with no issues.

And this is perfect for supercharged applications? Ugh this build of mine isn't cheap but I'm going to need this.

Originally Posted by Mike@VAC

We wanted to stick with the GTS theme. Others have more aggressive options, we chose this one since most of our clients would prefer the 4.4 over 4.6. We stock the 4.4 units.

I figured, that makes sense. Plus you know the stroke/rod ratio is correct as BMW chose it themselves. An extra 400cc's would be nice. If I do it down the line I'll get the crank and rods from you guys.

Originally Posted by Mike@VAC

Yep, sleeved. We haven't even thought about pushing the limits of the engine yet

Sticky and I have had this discussion before (you too, I think?) and I clearly advised against it for any car that will see the street. I do know people who have street legal cars with DSK and it's pretty foolish IMO - BUT it's their choice

Originally Posted by PEI330Ci

To be fair to those that have never gone this route, there are still additional costs involved to complete the install.

Oil tank + Breather system

Fabrication in trunk to mount oil tank (Usually requires moving the battery, and cutting out the floor of the trunk)

30+ feet of -12 AN line

Oil filtration

-12 fittings for oil lines

Bulkhead fittings for running the lines through trunk floor

Then there's the fun of 15-20 quart oil changes...but the good news is that you'll find the engine makes more power and you can run a TON of ring gap to make monster power.

And this is perfect for supercharged applications? Ugh this build of mine isn't cheap but I'm going to need this.

It's perfect for a road circuit car.

I figured, that makes sense. Plus you know the stroke/rod ratio is correct as BMW chose it themselves. An extra 400cc's would be nice. If I do it down the line I'll get the crank and rods from you guys.

Cool :-)

I have I intend to take it to the damn maximum.

Until we smoke the S65 in our white car, I doubt anything will happen here. We are going to start a project on our E90 M3 soon - that will make a lot more torque (esp down low than we are used to seeing